/*
- head-grav.cc -- part of GNU LilyPond
+ completion-note-heads-engraver.cc -- Completion_heads_engraver
- (c) 1997--2001 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+ (c) 1997--2007 Han-Wen Nienhuys <hanwen@xs4all.nl>
*/
-#include <ctype.h>
+#include <cctype>
+using namespace std;
-#include "rhythmic-head.hh"
-#include "paper-def.hh"
-#include "musical-request.hh"
-#include "dots.hh"
#include "dot-column.hh"
-#include "staff-symbol-referencer.hh"
+#include "dots.hh"
+#include "duration.hh"
+#include "global-context.hh"
#include "item.hh"
+#include "output-def.hh"
+#include "pitch.hh"
+#include "rhythmic-head.hh"
#include "score-engraver.hh"
+#include "spanner.hh"
+#include "staff-symbol-referencer.hh"
+#include "stream-event.hh"
+#include "tie.hh"
#include "warn.hh"
-/**
- make balls and rests
- */
+#include "translator.icc"
+
+/*
+ TODO: make matching rest engraver.
+*/
+
+/*
+ How does this work?
+
+ When we catch the note, we predict the end of the note. We keep the
+ events living until we reach the predicted end-time.
+
+ Every time process_music () is called and there are note events, we
+ figure out how long the note to typeset should be. It should be no
+ longer than what's specified, than what is left to do and it should
+ not cross barlines.
+
+ We copy the events into scratch note events, to make sure that we get
+ all durations exactly right.
+*/
+
class Completion_heads_engraver : public Engraver
{
- Link_array<Item> note_p_arr_;
-
- Link_array<Item> dot_p_arr_;
- Link_array<Music> note_req_l_arr_;
- Link_array<Music> scratch_note_reqs_;
+ vector<Item*> notes_;
+ vector<Item*> prev_notes_;
+ vector<Grob*> ties_;
+
+ vector<Stream_event*> note_events_;
Moment note_end_mom_;
- bool first_b_;
+ bool is_first_;
Rational left_to_do_;
+ Rational do_nothing_until_;
Moment next_barline_moment ();
- Duration find_nearest_duration (Rational length);
-
+ Item *make_note_head (Stream_event*);
+
public:
- TRANSLATOR_DECLARATIONS(Completion_heads_engraver);
+ TRANSLATOR_DECLARATIONS (Completion_heads_engraver);
protected:
virtual void initialize ();
- virtual void start_translation_timestep ();
- virtual bool try_music (Music *req_l) ;
- virtual void process_music ();
- virtual void stop_translation_timestep ();
+ void start_translation_timestep ();
+ void process_music ();
+ void stop_translation_timestep ();
+ DECLARE_TRANSLATOR_LISTENER (note);
};
void
Completion_heads_engraver::initialize ()
{
- first_b_ = false;
+ is_first_ = false;
}
-bool
-Completion_heads_engraver::try_music (Music *m)
+IMPLEMENT_TRANSLATOR_LISTENER (Completion_heads_engraver, note);
+void
+Completion_heads_engraver::listen_note (Stream_event *ev)
{
- if (Note_req * n =dynamic_cast <Note_req *> (m))
- {
- note_req_l_arr_.push (n);
-
- first_b_ = true;
- Moment musiclen = m->length_mom ();
- Moment now = now_mom();
-
- if (now_mom ().grace_part_)
- {
- musiclen.grace_part_ = musiclen.main_part_ ;
- musiclen.main_part_ = Rational (0,1);
- }
- note_end_mom_ = note_end_mom_ >? (now + musiclen);
- return true;
- }
- else if (dynamic_cast<Busy_playing_req*> (m))
- {
- return now_mom () < note_end_mom_;
- }
- return false;
+ note_events_.push_back (ev);
+ is_first_ = true;
+ Moment now = now_mom ();
+ Moment musiclen = get_event_length (ev, now);
+
+ note_end_mom_ = max (note_end_mom_, (now + musiclen));
+ do_nothing_until_ = Rational (0, 0);
}
+/*
+ The duration _until_ the next barline.
+*/
Moment
-Completion_heads_engraver::next_barline_moment ( )
+Completion_heads_engraver::next_barline_moment ()
{
Moment *e = unsmob_moment (get_property ("measurePosition"));
Moment *l = unsmob_moment (get_property ("measureLength"));
- if (!e || !l)
+ if (!e || !l || !to_boolean (get_property ("timing")))
{
- programming_error ("No timing props set?");
- return Moment (1,1);
+ return Moment (0, 0);
}
return (*l - *e);
}
-Duration
-Completion_heads_engraver::find_nearest_duration (Rational length)
+Item*
+Completion_heads_engraver::make_note_head (Stream_event *ev)
{
- int log_limit= 6;
-
- Duration d(0,0);
+ Item *note = make_item ("NoteHead", ev->self_scm ());
+ Pitch *pit = unsmob_pitch (ev->get_property ("pitch"));
- /*
- this could surely be done more efficient. Left to the reader as an
- excercise. */
- while (d.length_mom () > length && d.duration_log () < log_limit)
- {
- if (d.dot_count ())
- {
- d = Duration (d.duration_log (), d.dot_count ()- 1);
- continue;
- }
- else
- {
- d = Duration (d.duration_log () + 1, 2);
- }
- }
+ int pos = pit->steps ();
+ SCM c0 = get_property ("middleCPosition");
+ if (scm_is_number (c0))
+ pos += scm_to_int (c0);
- if (d.duration_log () >= log_limit)
- {
- // junk the dots.
- d = Duration (d.duration_log (), 0);
+ note->set_property ("staff-position", scm_from_int (pos));
- // scale up.
- d = d.compressed (length / d.length_mom ());
- }
-
- return d;
+ return note;
}
void
Completion_heads_engraver::process_music ()
{
- if (!first_b_ && !left_to_do_)
- return ;
+ if (!is_first_ && !left_to_do_)
+ return;
+
+ is_first_ = false;
+
+ Moment now = now_mom ();
+ if (do_nothing_until_ > now.main_part_)
+ return;
- first_b_ = false;
-
Duration note_dur;
Duration *orig = 0;
if (left_to_do_)
- {
- note_dur = find_nearest_duration (left_to_do_);
- }
+ note_dur = Duration (left_to_do_, false);
else
{
- orig = unsmob_duration (note_req_l_arr_[0]->get_mus_property ("duration"));
+ orig = unsmob_duration (note_events_[0]->get_property ("duration"));
note_dur = *orig;
}
-
Moment nb = next_barline_moment ();
- if (nb < note_dur.length_mom ())
+ if (nb.main_part_ && nb < note_dur.get_length ())
{
- note_dur = find_nearest_duration (nb.main_part_);
+ note_dur = Duration (nb.main_part_, false);
- Moment next = now_mom();
- next.main_part_ += note_dur.length_mom ();
- top_engraver ()->add_moment_to_process (next);
+ do_nothing_until_ = now.main_part_ + note_dur.get_length ();
}
if (orig)
- {
- left_to_do_ = orig->length_mom ();
- }
+ left_to_do_ = orig->get_length ();
- if (orig && note_dur.length_mom() != orig->length_mom())
+ for (vsize i = 0; left_to_do_ && i < note_events_.size (); i++)
{
- if (!scratch_note_reqs_.size ())
- for (int i = 0; i < note_req_l_arr_.size (); i++)
- {
- Music * m = note_req_l_arr_[i]->clone ();
- scratch_note_reqs_.push (m);
- }
-
- for (int i =0; i < scratch_note_reqs_.size (); i++)
- scratch_note_reqs_[i]->set_mus_property ("duration", note_dur.smobbed_copy ());
- }
+ bool need_clone = !orig || *orig != note_dur;
+ Stream_event *event = note_events_[i];
-
- for (int i = 0;
- left_to_do_ && i < note_req_l_arr_.size (); i++)
- {
- Item *note_p = new Item (get_property ("NoteHead"));
-
- Staff_symbol_referencer::set_interface (note_p);
-
- Music * req = note_req_l_arr_[i];
- if (scratch_note_reqs_.size())
- {
- req = scratch_note_reqs_[i];
- req->set_mus_property ("pitch",
- note_req_l_arr_[i]->get_mus_property ("pitch"));
- }
- note_p->set_grob_property ("duration-log",
- gh_int2scm (note_dur.duration_log ()));
+ if (need_clone)
+ event = event->clone ();
- int dots= note_dur.dot_count ();
- if (dots)
- {
- Item * d = new Item (get_property ("Dots"));
- Rhythmic_head::set_dots (note_p, d);
-
- /*
- measly attempt to save an eeny-weenie bit of memory.
- */
- if (dots != gh_scm2int (d->get_grob_property ("dot-count")))
- d->set_grob_property ("dot-count", gh_int2scm (dots));
-
- d->set_parent (note_p, Y_AXIS);
- announce_grob (d,0);
- dot_p_arr_.push (d);
- }
+ SCM pits = note_events_[i]->get_property ("pitch");
- Pitch *pit =unsmob_pitch (req->get_mus_property ("pitch"));
+ event->set_property ("pitch", pits);
+ event->set_property ("duration", note_dur.smobbed_copy ());
+ event->set_property ("duration-log", scm_from_int (note_dur.duration_log ()));
- int pos = pit->steps ();
- SCM c0 = get_property ("centralCPosition");
- if (gh_number_p (c0))
- pos += gh_scm2int (c0);
+ Item *note = make_note_head (event);
+ if (need_clone)
+ event->unprotect ();
+ notes_.push_back (note);
+ }
- note_p->set_grob_property ("staff-position", gh_int2scm (pos));
- if (to_boolean (get_property ("easyPlay")))
+ if (prev_notes_.size () == notes_.size ())
+ {
+ for (vsize i = 0; i < notes_.size (); i++)
{
- char s[2] = "a";
- s[0] = (pit->notename_i_ + 2)%7 + 'a';
+ Grob *p = make_spanner ("Tie", SCM_EOL);
+ Tie::set_head (p, LEFT, prev_notes_[i]);
+ Tie::set_head (p, RIGHT, notes_[i]);
- s[0] = toupper (s[0]);
- note_p->set_grob_property ("note-character", ly_str02scm (s));
+ ties_.push_back (p);
}
-
- announce_grob (note_p,req);
- note_p_arr_.push (note_p);
}
- left_to_do_ -= note_dur.length_mom ();
-
+ left_to_do_ -= note_dur.get_length ();
+ if (left_to_do_)
+ get_global_context ()->add_moment_to_process (now.main_part_ + left_to_do_);
/*
don't do complicated arithmetic with grace notes.
- */
+ */
if (orig
- && now_mom().grace_part_ )
- {
- left_to_do_ = Rational (0,0);
- }
-
+ && now_mom ().grace_part_)
+ left_to_do_ = Rational (0, 0);
}
-
+
void
Completion_heads_engraver::stop_translation_timestep ()
{
- for (int i=0; i < note_p_arr_.size (); i++)
- {
- typeset_grob (note_p_arr_[i]);
- }
- note_p_arr_.clear ();
-
- for (int i=0; i < dot_p_arr_.size (); i++)
- {
- typeset_grob (dot_p_arr_[i]);
- }
- dot_p_arr_.clear ();
+ ties_.clear ();
- for (int i = scratch_note_reqs_.size(); i--;)
- {
- scm_gc_unprotect_object (scratch_note_reqs_[i]->self_scm () );
-
- }
- scratch_note_reqs_.clear();
+ if (notes_.size ())
+ prev_notes_ = notes_;
+ notes_.clear ();
}
-Tie_req * tie_req = 0;
-
void
Completion_heads_engraver::start_translation_timestep ()
{
Moment now = now_mom ();
if (note_end_mom_.main_part_ <= now.main_part_)
{
- note_req_l_arr_.clear ();
- }
-
- if (left_to_do_)
- {
- if (!tie_req)
- tie_req = new Tie_req;
-
- bool succ = daddy_trans_l_->try_music (tie_req);
- if (!succ)
- {
- programming_error ("Completion_heads_engraver: no-one to make tie.");
- }
+ note_events_.clear ();
+ prev_notes_.clear ();
}
}
-Completion_heads_engraver::Completion_heads_engraver()
+Completion_heads_engraver::Completion_heads_engraver ()
{
}
-ENTER_DESCRIPTION(Completion_heads_engraver,
-/* descr */ "This engraver replaces
-@code{Note_heads_engraver}. It plays some trickery to
-break long notes and automatically tie them into the next measure.",
-/* creats*/ "NoteHead Dots",
-/* acks */ "",
-/* reads */ "",
-/* write */ "");
+ADD_TRANSLATOR (Completion_heads_engraver,
+ /* doc */
+ "This engraver replaces @code{Note_heads_engraver}. It plays"
+ " some trickery to break long notes and automatically tie them"
+ " into the next measure.",
+
+ /* create */
+ "NoteHead "
+ "Dots "
+ "Tie ",
+
+ /* read */
+ "middleCPosition "
+ "measurePosition "
+ "measureLength ",
+
+ /* write */
+ ""
+ );
projects / lilypond.git / blobdiff